All posts these days (for the last several years, IIRC) are moderated
They come to the mods (or at least to me, I'm not the only mod) in clumps, it seems.
On Wed, 26 Aug 2026 15:09:59 -0700, Henry Hurrass <audioteslallc@xxxxxxxxx> wrote:
I'm wondering if I got moderator approval to be back on the list
On Wed, Aug 26, 2026, 1:22 PM Benjamin Lockhart <
benjaminlockhart99@xxxxxxxxx> wrote:
> I tried to send this before but it didn't get through.
>
> Hi Jeff,
> I'm building a fully analog synth designed from scratch to work as a DRSSTC
> interrupter.
>
> It will have 4 voices of polyphony that can be split between 2 coils if
> desired, each voice consists of 2 voltage controlled oscillators which can
> phase against each other if desired (helps the bass notes sound fuller) or
> hard synced together for a different cool sound.
>
> I'm using a MIDI to CV converter module for eurorack modular synths (the
> Majella MCVC) to take the MIDI input and get 4 voices of CV and gate
> information.
>
> There will be 2 ADSR (attack, decay, sustain, release) envelope generators
> triggered by the gate signal when a key is pressed (and there is some
> latching logic so that the decay phase can work even after the key is
> released if desired) One envelope will control the on-time (pulse width) of
> the DRSSTC output, and the other one can be assigned to more complex
> modulation things.
> I want to try modulating the frequency of the oscillators with noise to
> maybe make percussive sounds as well.
>
> There is an output stage that takes the signals from all eight oscillators
> and combines them, sets the output pulse width, and applies a duty cycle
> limiter set to around 10% to make sure the coil never overheats no matter
> what notes are played. It will shorten the width of all output pulses if
> the total duty cycle exceeds the limit.
> It also has a control voltage input from the envelope generator for the
> pulse width, and a holdoff timer to make sure no pulses can be sent out too
> close together. This can result in hard switching of the bridge when the
> primary is still ringing down from the last pulse and the interrupter turns
> on again because most DRSSTC drivers don't synchronize the interrupter
> RISING edge to the feedback signal, only the FALLING edge, so the bridge
> can be enabled at any point in the RF cycle, not just the zero crossings.
>
> It is effectively a paraphonic synth because you cannot control the volume
> of different notes played at the same time independently, all notes at one
> time have the same pulse width.
>
> There will also be a low frequency oscillator for vibrato and probably more
> modulation options.
> There are no microcontrollers or code other than the MIDI converter module,
> it's all analog hardware.
> It's not even half done yet but I plan on sharing videos and schematics
> once it is.
>
> Benjamin
>
> On Wed, Aug 26, 2026 at 11:50 AM daniel_kline7657--- via Tesla <
> tcml@xxxxxxxxxxxxxxx> wrote:
>
> > I have that same issue.Dan K.
> > On Saturday, August 22, 2026 at 03:17:44 PM MDT, Daniel Hess <
> > 1ssehd@xxxxxxxxx> wrote:
> >
> > Hi David.
> >
> > FWIW, I'm seeing them. For some reason, some, but not all TCML email,
> > goes into my spam folder?
> >
> > Daniel Hess
> >
> > On 8/22/2026 9:16 AM, David Thomson wrote:
> > > If my posts are reaching the list, I don't see them. This leads me to
> > think
> > > my posts are being filtered.
> > >
> > > David Thomson
> > _______________________________________________
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> >
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> >
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